Let's say that the first train from Stockhom, Gothenburg, wherever arrives at Copenhagen central at 11.45, and you are going away 4th of november. Just fill that it in at "Date and time - outward journey".

This is an example - please use a date within 90 days from your current date.

You can skip "travellers" at this moment.

Now you're ready to search in Db's database. When I write this today, the result looks like in pic 2

Were you want to go and how you book your tickets are not always the same thing - booking section